Self and edwin e



L. w. LANGDON;

Stove Damper. I

Patented Nov. 30, 1869.

NPETEHS, RHOTO-LITHOGRAPHER. WASHINGTON. 0 C4 tinitedgtatra L. -W;LANGDON, or NORTHAMPTON, MASSACHUSETTS, ASSIGNOR TO HIM- pa l era;

SELF AND EDWIN 12. LOGKE, or- KEENE, NEW HAMPSHIRE Letters Patent 1v97,414, dataLNorcmber so, 1869.

' STOVE-DAMPER.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

Be it known that I, L. \V. LANGDON, of N orthampto uin the county ofHampshire, and State of .ll'llassachusetts, have inventeda new anduseful Stove- Damperyaml I do hereby declare that the tollowing isafull, clear, and exact description of the same, sut iicient to enableothers skilled in the art to which my invention appertains, to make anduse the same, reterence being had to the-accompanying drawings, formingpart of this specification, in which- Figure l is a, longitudinalcentral section of my damper, and V Figure 2 is a top view of the same.

.My invention is an improven'lent in that class of automatic damperswhich is operated by means of the expansion, and contraction of metal,caused by heat and cold: and

It consists- First, in the employment of a metallic tube, in such amanner that its expansion and contraction shall operate to open andclose a valve.

Second, in the application of an adjusting-lever to the automaticheat-regulator, whereby the valve may be raised or lowered, according tothe state of the weather, whether cold or warm; together with otherdevices perfecting the damper, as will be hereinafter full y described.

Similar letters of reference indicate corresponding parts in the twofigures. I

- My invention will be fully understood by reference to the accompanyingdrawings, wherein,

A represents a ring, cast with a partial coverfa,

having an offset, 1), formed with a central tube, 0, screw-threaded onthe inside.

Into this centre is screwed a tube, 13, made of metal which readilyexpands by the effect of heat. Brass will be mostlikely used for thispurpose.

0 represents a valve, cast with journals (1 d,-resting in bearings c 6,cast with the ring A.

This valve is so named as to till all the vacantspace of the ring. .7The valve is also cast with two openings, 1 i.

1) is a rod, of ,metalot' less expansibility than the metal composingthe tube B, in which said rod D is fitted. l I i This rod is formed witha head, f, and two'collars,

0-0, near its opposite end, which projects from 'the tube, as shown.

, E is an L-shaped casting, caught under the bar m,

which separates the openings 42 i in the valve.

In the upper part of this cast-inga rectangular opening is formed toreceive the end of a lever, .F, notched to engage with the bevelledsurface a, of the piece E.

set.

Near the opposite end of this lever F, a notch is formed, which rests onthe top of tube 0, in a recess formed for its reception.

The extreme end of lever l is so formed as to catch under the collar 0on rod D.

O is an indicator, fixed on one of the journals of the valves (J, andoperating outside the pipe in which the damper is situated.

. 1 represents a lever, fixed on the rod 1.), and extendin; out througha slot in the stove-pipe.

Tl 's lever is operated from right to left, for adjustment.

ferent degrees of heat in different stoves.

The lever l regulates the heat when the tube is rod to assume its formerposition, thus opening .the

valve.

The further the lever P is set to the left, the less heat is required toclose the valve.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. The employment of a tube, B, in such a manner that its expansion andcontraction shall operate to open and close the valve, substantially asherein described.

2. The adjusting-lever P, when connected to an automatic heat-regulator,placed inside the pipe, sub-' stantially as herein described.

3. The combination of the ring A, tnbe B, valve 0, rod D, lever F,casting E, and lever P, all operatiug substantially'as herein described.

, 4. In combination with the above, theiudicat-or 0,

arranged substantially as herein set forth.

To the above specification of my improvement in stove-pipe dampers, Ihave signed my name, this 9th of January, 1869.

. L. \V. LANGDON. \Vitnesses HENRY W. KENNEY,

ORANGE WRIGHT.

It 'will be observed that the tube B can be adjusted v, longitudinallyby screwing it in or out, to obtain dif-

